Then drive disappears until I reboot it again. It seems to get stuck on trying to unmount the disk. Tried several times but no luck. ANY IDEAS to get this SSD formatted, I was really pumped with the upgrade to SSD

Then drive disappears until I reboot it again. It seems to get stuck on trying to unmount the disk. Tried several times but no luck. ANY IDEAS to get this SSD formatted, I was really pumped with the upgrade to SSD

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Is it recognized through Windows (or Linux)? If so, try formatting it in HFS+ format through Paragon software for Windows (if I remember well, it's capable of formatting for Mac). The demo version is fully functional for 10 days.

Then drive disappears until I reboot it again. It seems to get stuck on trying to unmount the disk. Tried several times but no luck. ANY IDEAS to get this SSD formatted, I was really pumped with the upgrade to SSD

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If you were up to date with Software Update and installed the latest firmware prior to the drive crashing, then your MacBook Pro supports Internet Recovery. Try holding CMD OPT R at boot without any peripherals attached (do not have the external drive plugged in). Select your network and let it download the necessary Recovery Partition.

I am pretty sure it is the HD cable as Weaselboy suggested. I grabbed the old hard drive that I thought failed and put in in a friends mac and it worked. I ordered a new Apple HD cable and it should be here in a few days. I also ordered a caddy for the superdrive slot so I can throw in a HD for more storage. I'll update a soon as the cable arrives.

I got a brand new external WD HDD 2TB, same issue...I did cmd diskpart etc...tried almost everything then ! ... and as suggested and sounds completely odd, the cable is the issue.

I use my second (older) HDD cable, just use that one and it works well (partion,fornat,etc..). There is another guy who repairs disk and mentioned 10% of the time it s from the cable , not OS or HDD...I did not believe him, but after 2 days on it...I tried... ;-) damn just that.

I recently bought a SSD Samsung Evo 840 256GB to install in my Late 2011 Macbook Pro to replace the CD reader. I had Mountain Lion software up to date on my HD at the time of installation.

Today I installed the SSD to my computer and after partition I went to install the OXS and it gave me a lot of errors. It would jump pack to the recovery window after rebooting.

I installed the OSX on my HD again and it works just fine. When I went to the disk utility and checked the SSD, it gives me errors when reading the partition and it says that the disk can't be repaired. It can read the SSD, therefore it is connected properly, and I can place files inside of it but I can't do anything else.

Staff Member

I recently bought a SSD Samsung Evo 840 256GB to install in my Late 2011 Macbook Pro to replace the CD reader. I had Mountain Lion software up to date on my HD at the time of installation.

Today I installed the SSD to my computer and after partition I went to install the OXS and it gave me a lot of errors. It would jump pack to the recovery window after rebooting.

I installed the OSX on my HD again and it works just fine. When I went to the disk utility and checked the SSD, it gives me errors when reading the partition and it says that the disk can't be repaired. It can read the SSD, therefore it is connected properly, and I can place files inside of it but I can't do anything else.

Does anyone know what the problem is or how I could solve it?

Thank you!!

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It could be a bad cable like others in this thread had. Can you put the SSD in a USB enclosure and see if it works well there? That would eliminate the cable from the mix to troubleshoot.

Staff Member

I don't have a USB enclosure to try it out, maybe I can get one tomorrow. Is there a possibility that the SSD is the problem? Or anything else?

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It is possible, but those don't seem to have a high rate of DOA right out of the box. Only way to tell for sure is to take the cable out of the mix by trying an enclosure. There do seem to be a lot of these cable failures 2010 and 2011 models recently for some reason.

It is possible, but those don't seem to have a high rate of DOA right out of the box. Only way to tell for sure is to take the cable out of the mix by trying an enclosure. There do seem to be a lot of these cable failures 2010 and 2011 models recently for some reason.

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Thank you so much. I will try tomorrow to see if it works and if not, I'll come back to ask more questions

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